订机位 meaning in Chinese

book a flight
ticket booking

We had not booked the air tickets beforehand since we did not want to alert anyone . .
我们在此之前不敢订机位，恐怕会泄露行动。
But when the two staff members of the legal firm reached the airport , the airline counter was about to close , all computers were off and the airline staff was about to leave
可是当律师行职员赶到机场航空公司的柜台时，柜台职员已到下班之时，连订机位的电脑也关掉了。